1611216701 has 16 divisors (see below), whose sum is σ = 1803916800. Its totient is φ = 1430120448.

The previous prime is 1611216683. The next prime is 1611216707. The reversal of 1611216701 is 1076121161.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1611216701 - 2²⁶ = 1544107837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611216707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60845 + ... + 83213.

It is an arithmetic number, because the mean of its divisors is an integer number (112744800).

Almost surely, 2^1611216701 is an apocalyptic number.

It is an amenable number.

1611216701 is a deficient number, since it is larger than the sum of its proper divisors (192700099).

1611216701 is a wasteful number, since it uses less digits than its factorization.

1611216701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22628.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1611216701 is about 40139.9638888726. The cubic root of 1611216701 is about 1172.3338859023. Note that the first 3 decimals are identical.

Adding to 1611216701 its reverse (1076121161), we get a palindrome (2687337862).

The spelling of 1611216701 in words is "one billion, six hundred eleven million, two hundred sixteen thousand, seven hundred one".